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Tags:, electromagnetic, microwave, black hole
(View ID:53362)
 Chinese researchers have successfully manufacture of microwave frequency electromagnetic wave absorbers.The device is composed of 60 thin concentric cylindrical rings, with the ability to absorb microwave radiation, comparable to astrophysical black holes (in the space where this guy is hungry to absorb the material and light). 6 月 3 issue of the New Journal of Physics (Institute of Physics and co-founder of the German Physical Society) reported the results of the study.The researchers described how to use the special nature of the material - a distortion of light and other electromagnetic waves can be ordered composite materials. Southeast University, Nanjing, China, State Key Laboratory scientists Cui Tiejun (Tie Jun Cui) and Cheng Qiang (Qiang Cheng), design and production of the absorption device, formally known as the full range of the electromagnetic shock absorber (omnidirectional electromagnetic absorber), the complex structure of 60 circuit boards with copper coaxial ring composition.Alternate mode of each layer, the control resonant or not resonant electromagnetic waves. This device can be designed to capture and absorb electromagnetic radiation from all directions, and 99% absorption rate of conversion of energy into heat.Therefore, it is like a magnetic or electromagnetic bold black hole present, the device is only applicable to microwave, but the researchers are planning to develop a black hole absorbs visible light. the present results can be found in some applications in the microwave.The researchers wrote that between the theoretical and experimental results are consistent, showing the full range of such materials for the construction of artificial absorbing device of outstanding potential. the core of the attenuation of electromagnetic energy can be converted into heat energy, we expect the kinds of devices will be in thermal emission and absorption of electromagnetic waves has important applications. http://vividscience.org/2010/06/07/artificial-black-hole.html Share to NetEase microblogging
, electromagnetic, microwave, black holes, electromagnetic, electromagnetic wave absorption, the absorption device, resonance, physics, researchers, scientists
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